{"681706":{"#nid":"681706","#data":{"type":"event","title":"PhD Proposal by Won Joon Jeong","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EWon Joon Jeong\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EAdvisor: Prof. Matthew T. McDowell\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003Ewill propose a doctoral thesis entitled,\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EUnderstanding High-Capacity Anode Materials in Solid-State Batteries: Reaction Mechanisms and Interface Evolution\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003EOn\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EThursday, April 24, 2024\u003C\/p\u003E\u003Cp\u003E12pm \u2013 2pm\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003ECallaway Manufacturing Research Building, Auditorium 101\u003Cbr\u003Eand\u003C\/p\u003E\u003Cp\u003EVirtually via MS Teams\u003C\/p\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_NWM2OTI2YWMtNTI0Yi00NTBlLThkNjItYjM3YWM1MzE4OWI5%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%226fd62816-b43e-4ad4-810f-d8f0645c865c%22%7d\u0022\u003Ehttps:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_NWM2OTI2YWMtNTI0Yi00NTBlLThkNjItYjM3YWM1MzE4OWI5%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%226fd62816-b43e-4ad4-810f-d8f0645c865c%22%7d\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EProf. Matthew T. McDowell \u2013 School of Materials Science and Engineering (advisor)\u003C\/p\u003E\u003Cp\u003EProf. Meilin Liu \u2013 School of Materials Science and Engineering\u003C\/p\u003E\u003Cp\u003EProf. Seung Soon Jang \u2013 School of Materials Science and Engineering\u003C\/p\u003E\u003Cp\u003EProf. Anju Toor \u2013 School of Materials Science and Engineering\u003C\/p\u003E\u003Cp\u003EProf. Hailong Chen \u2013 George W. Woodruff School of Mechanical Engineering\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EHigh-capacity anode materials, including lithium metal and alloy anodes, offer substantial advantages for solid-state batteries over conventional lithium-ion batteries. However, their practical implementation is limited by interfacial instability during repeated cycling. Morphological changes in the anode during electrochemical cycling can cause loss of contact with the solid-state electrolyte, resulting in increased cell resistance. Unwanted side reactions between high-capacity anode materials and solid-state electrolyte present an additional challenge that must be addressed. Furthermore, the electrochemical behavior of these anode materials under varying operating conditions remains poorly understood.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EPreviously, I investigated the electrochemical lithiation\/delithiation behavior of 12 different elemental alloy anodes in solid-state batteries with Li6PS5Cl solid-state electrolyte, enabling direct behavioral comparisons. The materials showed highly divergent first-cycle Coulombic efficiency in half cells, ranging from 99.3% for indium to ~20% for antimony. Through microstructural imaging and comparison to liquid-electrolyte cells, I have identified that lithium trapping within the foil during delithiation as the principal reason for low Coulombic efficiency in most materials, with interfacial contact loss exacerbating this effect. The exceptional Coulombic efficiency of indium was found to be due to unique delithiation reaction front morphology evolution in which the high-diffusivity LiIn phase remains at the solid-state electrolyte interface. This comprehensive study links elemental composition to reaction and degradation behavior for alloy anodes and thus provides guidance towards better solid-state batteries.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EBased on the findings from my previous work, I propose two research objectives to advance the understanding of interfacial instability in high-capacity anode materials in solid-state batteries. First, I aim to investigate interphase formation at the interface between alloy anodes and solid-state electrolyte under various stack pressures. This study will highlight the potential advantages of alloy anodes over lithium metal anode in suppressing interphase growth kinetics. Finally, I will examine interfacial evolution at low temperatures in lithium metal and anode-free solid-state batteries. This work will identify key challenges associated with low temperature operation and offer guidance for developing high-performance lithium metal based solid-state batteries under such conditions.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cstrong\u003EUnderstanding High-Capacity Anode Materials in Solid-State Batteries: Reaction Mechanisms and Interface Evolution\u003C\/strong\u003E\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Understanding High-Capacity Anode Materials in Solid-State Batteries: Reaction Mechanisms and Interface Evolution"}],"uid":"27707","created_gmt":"2025-04-09 19:51:42","changed_gmt":"2025-04-09 19:52:42","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2025-04-24T12:00:00-04:00","event_time_end":"2025-04-24T14:00:00-04:00","event_time_end_last":"2025-04-24T14:00:00-04:00","gmt_time_start":"2025-04-24 16:00:00","gmt_time_end":"2025-04-24 18:00:00","gmt_time_end_last":"2025-04-24 18:00:00","rrule":null,"timezone":"America\/New_York"},"location":"Callaway Manufacturing Research Building, Auditorium 101 and Virtually via MS Teams","extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"102851","name":"Phd proposal"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}